/*
 * Copyright (C) 2010 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.uzmap.pkg.uzmodules.uzFNScanner.Zxing.decoding;

import java.util.Hashtable;

import org.simple.eventbus.EventBus;
import org.simple.eventbus.Subscriber;

import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.uzmap.pkg.uzcore.UZResourcesIDFinder;
import com.uzmap.pkg.uzmodules.uzFNScanner.UzFNScanner;
import com.uzmap.pkg.uzmodules.uzFNScanner.Zxing.CaptureActivity;
import com.uzmap.pkg.uzmodules.uzFNScanner.Zxing.camera.CameraManager;
import com.uzmap.pkg.uzmodules.uzFNScanner.Zxing.camera.PlanarYUVLuminanceSource;

final class DecodeHandler extends Handler {

	private static final String TAG = DecodeHandler.class.getSimpleName();

	private final CaptureActivity activity;
	private final MultiFormatReader multiFormatReader;
	
	private boolean mPortraitFlag = true;

	DecodeHandler(CaptureActivity activity,
			Hashtable<DecodeHintType, Object> hints) {
		multiFormatReader = new MultiFormatReader();
		multiFormatReader.setHints(hints);
		this.activity = activity;
		
		EventBus.getDefault().register(this);
	}
	
	@Subscriber(tag = "reset_orientation")
    private void updateFlag(boolean flag) {
        mPortraitFlag = flag;
    }

	@Override
	public void handleMessage(Message message) {
		int decode = UZResourcesIDFinder.getResIdID("fn_decode");
		int quit = UZResourcesIDFinder.getResIdID("fn_quit");

		if (message.what == decode) {
			// Log.d(TAG, "Got decode message");
			int width = message.arg1;
			int heigth = message.arg2;
			decode((byte[]) message.obj, message.arg1, message.arg2);
		} else if (message.what == quit) {
			Looper.myLooper().quit();

		}

	}

	/**
	 * Decode the data within the viewfinder rectangle, and time how long it
	 * took. For efficiency, reuse the same reader objects from one decode to
	 * the next.
	 * 
	 * @param data
	 *            The YUV preview frame.
	 * @param width
	 *            The width of the preview frame.
	 * @param height
	 *            The height of the preview frame.
	 */
	private void decode(byte[] data, int width, int height) {
		long start = System.currentTimeMillis();
		Result rawResult = null;

		
//		byte[] rotatedData = new byte[data.length];
//		for (int y = 0; y < height; y++) {
//			for (int x = 0; x < width; x++)
//				rotatedData[x * height + height - y - 1] = data[x + y * width];
//		}
//		int tmp = width; // Here we are swapping, that's the difference to #11
//		width = height;
//		height = tmp;
//		data = rotatedData;
		
		if (UzFNScanner.isWindow) {
			byte[] rotatedData = new byte[data.length];
            for (int y = 0; y < height; y++) {
                for (int x = 0; x < width; x++)
                    rotatedData[x * height + height - y - 1] = data[x + y * width];
            }
            int tmp = width; // Here we are swapping, that's the difference to #11
            width = height;
            height = tmp;
            data = rotatedData;
		}else {
			if (CaptureActivity.mOrientationFlag) {
	            byte[] rotatedData = new byte[data.length];
	            for (int y = 0; y < height; y++) {
	                for (int x = 0; x < width; x++)
	                    rotatedData[x * height + height - y - 1] = data[x + y * width];
	            }
	            int tmp = width; // Here we are swapping, that's the difference to #11
	            width = height;
	            height = tmp;
	            data = rotatedData;
	        }
		}
	
		PlanarYUVLuminanceSource source = CameraManager.get().buildLuminanceSource(data, width, height);
		BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
		try {
			rawResult = multiFormatReader.decodeWithState(bitmap);
		} catch (ReaderException re) {
			// continue
		} finally {
			multiFormatReader.reset();
			bitmap = null;
		}

		if (rawResult != null) {
			int decode_succeeded = UZResourcesIDFinder
					.getResIdID("fn_decode_succeeded");

			long end = System.currentTimeMillis();
			Log.d(TAG, "Found barcode (" + (end - start) + " ms):\n"
					+ rawResult.toString());
			Message message = Message.obtain(activity.getHandler(),
					decode_succeeded, rawResult);
			Bundle bundle = new Bundle();
			bundle.putParcelable(DecodeThread.BARCODE_BITMAP,
					source.renderCroppedGreyscaleBitmap());
			message.setData(bundle);
			// Log.d(TAG, "Sending decode succeeded message...");
			message.sendToTarget();
		} else {
			int decode_failedid = UZResourcesIDFinder
					.getResIdID("fn_decode_failed");

			Message message = Message.obtain(activity.getHandler(),
					decode_failedid);
			message.sendToTarget();
		}
	}

}
